Heat and AC

[SCD1956]

I need help with finding a replacement vacuum actuator for heat / air diverter door on my 1987 chevy R10. Is there a diagram that shows this part so, I can possibly get a new actuator?

 

[Edelbrock]

Could the old one be repaired?

 

[SCD1956]

I broke off the vacuum connection from the top of the diaphragm body. I tried to re-glue and even tried to re-melt the connection back onto the body but, my attempts were futile. Any suggestions?

 

[Edelbrock]

Get any pics?

 

[Edelbrock]

Permatext the right stuff gasket maker and JB Quick / JB Weld comes to mind.

 

[SCD1956]

I'll give that a try. Just need to get the connector to be stiff enough to hold the vacuum line on and maintain vacuum to allow the actuator to work properly.

 

[SCD1956]

By the way I am not a seasoned computer tech. I do not know how to send pics of anything. Maybe I can get one of my grandkids to help me in that endeavor.

 

[SCD1956]

I could use some help with identifying the proper wiring set up on the fuel selector switch for my 1987 Chevy truck. It as of right now only uses the left side tank. If I switch to the other tank the truck quits running. Can anyone help me with this?

 

[75gmck25]

Why don't you try downloading this repair manual and taking a look through the PDF document. This is part of the reference library on this site, and they also have wiring diagrams and other information.

https://www.mediafire.com/download/et3q357neau4wfp/ST_330_87_1987_Chevrolet_Light_Duty_Truck_Service_Manual.pdf.

 

[SCD1956]

Thanks for the information! Did not know where to find that information.

 

[Broken85]

I could use some help with identifying the proper wiring set up on the fuel selector switch for my 1987 Chevy truck. It as of right now only uses the left side tank. If I switch to the other tank the truck quits running. Can anyone help me with this?

I would check the switch valve first. Get under the truck and have someone throw the switch and see if the valve is making noise.

Two options; disconnect the wiring harness off the pollak valve and use a test light to map it out. If you have power on two separate wires (when switched) everything on the truck is fine, change the pollak valve. 2 Take the switch out of the dash, unplug it, use a test light to find the hot and then jump them to bypass the switch and see if the valve moves. 87 fuel tank wiring is a unique year since they went to fuel injection that year, but the pollak valves are the same as the previous years. 87 tank switches are unique to only that year too. I think the below diagram will help.

If you have power on both legs when switched, and you hear the valve moving when you switch it, your problem is probably a bad in-tank fuel pump.

 

[Sad Sack]

I need help with finding a replacement vacuum actuator for heat / air diverter door on my 1987 chevy R10. Is there a diagram that shows this part so, I can possibly get a new actuator?

https://www.classicindustries.com/product/1996686.html

1985 - 1991 Chevrolet Truck NOS Vacuum Actuator GM # 1996731 - Oldsmobile Obsolete

This new old stock vacuum actuator was manufactured by General Motors for use on the following models: Chevrolet Truck 1985 – 1986 C60, Chevrolet Truck 1987 – 1991 RV C60. NOTE: Images show the condition and what is included in the sale. *This item may be repackaged to protect it from shelf wear.

oldsobsolete.com

Genuine Chevrolet Blend Door Actuator - GM Parts Giant

www.gmpartsgiant.com

Does this look like the part you need? And does the old one have a part number stamped on it?

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